/*
 * Copyright 2009 Armando Blancas
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package tests.taskgraph.tasks.data;

import java.io.IOException;

import junit.framework.Assert;
import junit.framework.JUnit4TestAdapter;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import taskgraph.channels.Channel;
import taskgraph.ports.InputPort;
import taskgraph.ports.OutputPort;
import taskgraph.tasks.data.Count;

public class CountTest {

	/**
	 * Runs the test suite in this class from the command line.
	 * 
	 * @param args	Arguments are ignored.
	 */
	public static void main(String[] args) {
		org.junit.runner.JUnitCore.runClasses(CountTest.class);
	}
	
	/**
	 * Provides compatibility with 3.x versions of JUnit.
	 * 
	 * @return A 3.x-compatible test suite.
	 */
	public static junit.framework.Test suite() {
		return new JUnit4TestAdapter(CountTest.class);
	}
	
	private InputPort<Product> input;
	private OutputPort<Object> output;
	
	@Before
	public void setup() {
		Channel<Product> channelp = new Channel<Product>();
		Channel<Object> channell = new Channel<Object>();
		input = channelp.getInputPort();
		output = channell.getOutputPort();
	}
	
	@After
	public void cleanup() throws IOException {
		output.close();
		input.close();
	}
	
    /*+----------------------------------------------------------------------+
	  |                                                                      | 
	  | Test the constructors.                                               | 
	  |                                                                      | 
	  +----------------------------------------------------------------------+*/
	
	@Test
	public void defaultConstructor() {
		Count<Product> task = new Count<Product>();
		Assert.assertNotNull(task);
	}
	
	@Test
	public void defaultInstanceClass() {
		Count<Product> task = new Count<Product>();
		Assert.assertEquals(Count.class, task.getClass());
	}

	@Test
	public void constructorWithPorts() {
		Count<Product> task = new Count<Product>(input, output);
		Assert.assertNotNull(task);
	}
	
	@Test
	public void constructorWithPortsAndClass() {
		Count<Product> task = new Count<Product>(input, output);
		Assert.assertEquals(Count.class, task.getClass());
	}

    /*+----------------------------------------------------------------------+
	  |                                                                      | 
	  | Test the run method.                                                 | 
	  |                                                                      | 
	  +----------------------------------------------------------------------+*/
	
	@Test
	public void testRun() throws IOException {
		Product[] products = {
			new Product(5005, "Notebook", 2.50f),
			new Product(1400, "Pencil",   0.49f),
			new Product(0001, "Eraser",   0.60f),
			new Product(4040, "Bookend", 15.25f),
			new Product(1205, "Desklamp",12.50f),
			new Product(3010, "Folder",   0.39f),
			new Product(9944, "Envelope", 0.25f),
			new Product(1942, "Markers",  8.25f)
		};

		Channel<Product> ch1 = new Channel<Product>();
		Channel<Object> ch2 = new Channel<Object>();
		Count<Product> task = 
			new Count<Product>(ch1.getInputPort(), ch2.getOutputPort());
		
		OutputPort<Product> outputPort = ch1.getOutputPort();
		for (Product p : products)
			outputPort.write(p);
		outputPort.close();
		
		task.run();
		
		InputPort<Object> inputPort = ch2.getInputPort();
		long expected = products.length;
		long actual = (Long) inputPort.read();
		Assert.assertEquals(expected, actual);
		inputPort.close();
	}
	
    /*+----------------------------------------------------------------------+
	  |                                                                      | 
	  | Negative tests for constructors.                                     | 
	  |                                                                      | 
	  +----------------------------------------------------------------------+*/

	@Test(expected=IllegalArgumentException.class)
	public void constructorWithNullInputPort() throws IOException {
		new Count<Product>(null, output);
	}

	@Test(expected=IllegalArgumentException.class)
	public void constructorWithNullOutputPort() throws IOException {
		new Count<Product>(input, null);
	}

    /*+----------------------------------------------------------------------+
	  |                                                                      | 
	  | Negative tests.                                                      | 
	  |                                                                      | 
	  +----------------------------------------------------------------------+*/

}
